PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The use of toxic chemicals contributes to both air pollution, such as acid rain, and water pollution.
http://www.w3.org/ns/prov#wasQuotedFrom
  • sierraclubgreenhome.com